willful

那个任性的孩子坚持要买那个玩具，尽管妈妈已经说了不行。

The ___willful child insisted on buying that toy despite his mother's refusal.

尽管老师多次警告，他还是坚持自己的任性行为。

Despite repeated warnings from the teacher, he continued his ___willful behavior.

尽管老师警告过，他还是故意破坏学校的财产。

Despite the teacher's warning, he committed ___willful destruction of school property.